Boot problem on 7043-260

Hi everybody,
before sorry for my bad english.
I have a problem with a Ibm 7043-260, i have install AIX 5.2, but, when i boot the machine, the SO don't load and the machine is freeze, if i press enter on the console, appear the service processor firmware menu.
The only way for boot in the correct mode the machine and obtain the command prompt is press F1 when the system check "memory keyboard network scsi speaker" and enter in the sms menu, select "multiboot menu" (option 2), select "Select Software" (option 1), and select the option AIX 5.2.0.
In this mode the SO boot correctly.
The boot configuration is correct, but for don't be a mistake i want to mirror the rootvg on the second disk with the command "mirrorvg rootvg hdisk1" but i recevive this message :
# mirrorvg rootvg hdisk1
0516-304 getlvodm: Unable to find device id 00000000000000000000000000000000 in
the Device

Configuration Database.
0516-014 mirrorvg: []: The physical volume appears to belong to another

volume group.
0516-1200 mirrorvg: Failed to mirror the volume group.
what must i do for resolve this problem and boot in the correct mode the machine ?
Thanks a lot for the reply

email@removed writes:
have a problem with a Ibm 7043-260, i have install AIX 5.2, but, when i
boot the machine, the SO don't load and the machine is freeze, if i press
enter on the console, appear the service processor firmware menu.

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